Dog drinking white vinegar ok?

i think your dog needs to see a vet and get on appropriate flea prevention and the appropriate cleaner and medication for the ears ... that is what would be best for your pup ... do not treat when you do not know what it is for, i.e., you do not know it is yeast so how can you treat for that ??? apple cider vinegar can work a bit for fleas, the dog would have to be consuming apple cidar vinegar and have it applied to the coat (ever smelled that stuff ???) for it to have any effect whatsoever ... bring the pup to the vet ... if the dog has recurrent ear infections it could be allergies and you might have to change the food ... no white vinegar !!!